Doodle/Sketch have a lifespan that is, at best, gauged at "medium/low". This means if you raise them well, you can sometimes get 3, maybe 4 years out of them, whereas a more common medium would reach 5 with little issue and some breeds can go up beyond that. Doodle, being a "joke" monster, have a fairly high stat gain rate and mature fast, but burn out just as quickly, so if you're not raising it well, it might be "old" by the time you get to 2 years.
